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## org.bouncycastle.pqc.crypto.faest
Class FaestSigner

    java.lang.Object
      org.bouncycastle.pqc.crypto.faest.FaestSigner

All Implemented Interfaces:
  MessageSigner

public class FaestSigner
extends java.lang.Object
implements MessageSigner

FAEST signature generation and verification engine.

Exposes the standard `MessageSigner` interface by delegating to the core `Faest#sign` and `Faest#verify` routines. For signing, a fresh salt () is drawn from the supplied (or default) random source on each invocation; the OWF output needed by the signing algorithm is re‑derived internally from the private key.

References:

FAEST Official Website FAEST v2.0 Specification Document (NIST Round 2) FAEST Reference Implementation (C)

Constructor Summary
`FaestSigner()`

Method Summary
`byte[]` | `generateSignature(byte[] message)` sign the passed in message (usually the output of a hash function).
`void` | `init(boolean forSigning, CipherParameters param)` initialise the signer for signature generation or signature verification.
`boolean` | `verifySignature(byte[] message, byte[] signature)` verify the message message against the signature value.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### FaestSigner

    public FaestSigner()

Method Detail

### init

    public void init(boolean forSigning,
                     CipherParameters param)

  Description copied from interface: `MessageSigner`
  initialise the signer for signature generation or signature verification.

  Specified by:
    `init` in interface `MessageSigner`
  Parameters:
    `forSigning` - true if we are generating a signature, false otherwise.
    `param` - key parameters for signature generation.

### generateSignature

    public byte[] generateSignature(byte[] message)

  Description copied from interface: `MessageSigner`
  sign the passed in message (usually the output of a hash function).

  Specified by:
    `generateSignature` in interface `MessageSigner`
  Parameters:
    `message` - the message to be signed.
  Returns:
    the signature of the message

### verifySignature

    public boolean verifySignature(byte[] message,
                                   byte[] signature)

  Description copied from interface: `MessageSigner`
  verify the message message against the signature value.

  Specified by:
    `verifySignature` in interface `MessageSigner`
  Parameters:
    `message` - the message that was supposed to have been signed.
    `signature` - the signature of the message

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